ZENILLIA AND ALLIED GENERA SELLERS 31 



outer vertical bristle; facial ridge bristly on lowest one-fifth to one- 

 fourth ; gena one-fourth to one-third eye height ; antenna black, third 

 segment in male four and one-half to five and in female three times 

 the second; arista thickened on basal two-fifths, penultimate segment 

 short ; palpus yellow. 



Thorax dull golden-pollinose ; four mesonotal vittae; scutellum 

 yellowish with three pairs of marginal scutellars and one decussate 

 apical pair turned backward, one pair of cliscal scutellars; legs reddish 

 brown or black; midtibia with one median anterolateral bristle, fe- 

 male with one shorter bristle above on anterolateral side, one inner 

 central bristle; hind tibia ciliate. 



Abdomen golden-pollinose with a brownish tinge; first segment, 

 apical one-fourth to one-third of segments 2 and 3, and vitta on sec- 

 ond segment, black ; apical border of pollen slightly V-shaped inward, 

 making a broad obtuse angle ; first and second segments with a pair 

 and third and fourth with a row of marginal macrochaetae ; second 

 and third segments with a pair and fourth with a row of discal 

 macrochaetae. 



Hypopygium, inner and outer forceps of same length, outer for- 

 ceps wide, tapering gradually to a point, curving inward. 



Type localities. — Mexico and New Mexico. 



Distribution. — Mexico 7, Costa Rica 1, New Mexico 1. 



Type. — Type series of Exorista ochracea, British Museum. 

 Chrysomasicera borealis, male, U.S.N.M. No. 19613. 



Host. — Unknown. 



Remarks. — Description based on an examination of the following 

 material: Type male of Chrysomasicera borealis Zabeled "Top of Las 

 Vegas Range, N. Mex., June 28. In life brilliant golden shot with 

 green"; one female, Las Vegas, N. Mex., August 4 (Barber) ; one male, 

 Atzcapotzaltongo, Mexico, August 31, 1922 (Smith) ; and one female, 

 Mexico City, Mexico (Muller). Dr. Aldrich examined the type ma- 

 terial of ochracea in the British Museum, and he was of the opinion 

 that borealis is a synonym of ochracea. 



The writer had the privilege of examining the type series of 

 Exorista ochracea. This series is a composite mixture of species, some 

 specimens of which resemble borealis. 



2. Genus PHRYXE Robineau-Desvoidy 



Phryxe Robineau-Desvoidy, Mem. Acad. Sci. Inst. France, vol. 2, p. 158, 1830; 

 Histoire naturelle des dipteres des environs de Paris, vol. 1, p. 329 [on 

 page 358 (P. athaliae Robineau-Desvoidy) =Tachina vulgaris Fallen], 1863. — 

 Coquilett, Proc. U. S. Nat. Mus., vol. 37, p. 589, 1910.— Townsend, Manual 

 of myiology, pt. 4, pp. 220-221, 224-220, 272, 280, 1936. (Genotype, (P. 

 athaliae) =Tacliina vulgaris Fallen. By designation of Robineau-Desvoidy, 

 1863, in synonymy.) 



